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# -*- coding: utf-8 -*-
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
# License for the specific language governing permissions and limitations
# under the License.
import netaddr
import os_net_config
from os_net_config import objects
from os_net_config import utils
from os_net_config.openstack.common import processutils
# TODO(?): should move to interfaces.d
def _network_config_path():
return "/etc/network/interfaces"
class ENINetConfig(os_net_config.NetConfig):
"""Debian/Ubuntu implementation for network config
Configure iface/bridge/routes using debian/ubuntu
/etc/network/interfaces format.
"""
def __init__(self):
self.interfaces = {}
self.routes = {}
self.bridges = {}
def _addCommon(self, interface, static_addr=None):
data = ""
address_data = ""
if static_addr:
address_data += " address %s\n" % static_addr.ip
address_data += " netmask %s\n" % static_addr.netmask
else:
v4_addresses = interface.v4_addresses()
if v4_addresses:
data += self._addCommon(interface, v4_addresses[0])
v6_addresses = interface.v6_addresses()
if v6_addresses:
data += self._addCommon(interface, v6_addresses[0])
if data:
return data
if isinstance(interface, objects.Vlan):
_iface = "iface vlan%i " % interface.vlan_id
else:
_iface = "iface %s " % interface.name
if static_addr and static_addr.version == 6:
_iface += "inet6 "
else:
_iface += "inet "
if interface.use_dhcp:
_iface += "dhcp\n"
elif interface.addresses:
_iface += "static\n"
else:
_iface += "manual\n"
if isinstance(interface, objects.OvsBridge):
data += "auto %s\n" % interface.name
data += "allow-ovs %s\n" % interface.name
data += _iface
data += address_data
data += " ovs_type OVSBridge\n"
if interface.members:
data += " ovs_ports"
for i in interface.members:
data += " %s" % i.name
data += "\n"
for i in interface.members:
data += " pre-up ip addr flush dev %s\n" % i.name
elif interface.ovs_port:
if isinstance(interface, objects.Vlan):
data += "auto vlan%i\n" % interface.vlan_id
data += "allow-%s vlan%i\n" % (interface.bridge_name,
interface.vlan_id)
data += _iface
data += address_data
data += " ovs_bridge %s\n" % interface.bridge_name
data += " ovs_type OVSIntPort\n"
data += " ovs_options tag=%s\n" % interface.vlan_id
else:
data += "auto %s\n" % interface.name
data += "allow-%s %s\n" % (interface.bridge_name,
interface.name)
data += _iface
data += address_data
data += " ovs_bridge %s\n" % interface.bridge_name
data += " ovs_type OVSPort\n"
elif isinstance(interface, objects.Vlan):
data += "auto vlan%i\n" % interface.vlan_id
data += _iface
data += address_data
data += " vlan-raw-device %s\n" % interface.device
else:
data += "auto %s\n" % interface.name
data += _iface
data += address_data
if interface.mtu != 1500:
data += " mtu %i\n" % interface.mtu
return data
def addInterface(self, interface):
data = self._addCommon(interface)
self.interfaces[interface.name] = data
if interface.routes:
self._addRoutes(interface.name, interface.routes)
def addBridge(self, bridge):
data = self._addCommon(bridge)
self.bridges[bridge.name] = data
if bridge.routes:
self._addRoutes(bridge.name, bridge.routes)
def addVlan(self, vlan):
data = self._addCommon(vlan)
self.interfaces[vlan.name] = data
if vlan.routes:
self._addRoutes(vlan.name, vlan.routes)
def _addRoutes(self, interface_name, routes=[]):
data = ""
for route in routes:
rt = netaddr.IPNetwork(route.ip_netmask)
data += "up route add -net %s netmask %s gw %s\n" % (
str(rt.ip), str(rt.netmask), route.next_hop)
data += "down route del -net %s netmask %s gw %s\n" % (
str(rt.ip), str(rt.netmask), route.next_hop)
self.routes[interface_name] = data
def apply(self):
new_config = ""
# write out bridges first. This ensures that an ifup -a
# on reboot brings them up first
for bridge_name, bridge_data in self.bridges.iteritems():
route_data = self.routes.get(bridge_name)
bridge_data += (route_data or '')
new_config += bridge_data
for interface_name, iface_data in self.interfaces.iteritems():
route_data = self.routes.get(interface_name)
iface_data += (route_data or '')
new_config += iface_data
if (utils.diff(_network_config_path(), new_config)):
for interface in self.interfaces.keys():
processutils.execute('/sbin/ifdown', interface,
check_exit_code=False)
for bridge in self.bridges.keys():
processutils.execute('/sbin/ifdown', bridge,
check_exit_code=False)
utils.write_config(_network_config_path(), new_config)
for bridge in self.bridges.keys():
processutils.execute('/sbin/ifup', bridge)
for interface in self.interfaces.keys():
processutils.execute('/sbin/ifup', interface)
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